o neill



(No Mddel.) A 2 Sheets-Sheet 1.

E. ONBILL.

Valve Motion Gut-off.

No. 240,756. 7 Patented April 26,1881.

Witnees es N PEI'ERS, PHOTO-LITHOGRAPNER. WASHINGTON. D. G.

No M d l. ZSheets-Sheet 2. 6 E. ONEILL.

Valve Motion Out-off. No. 240,756. Pat ented April 26,1881.

Witnesses N. PETERS. FHOTOLITHOG RAPHER, WASHINGTON, D C.

UNITED STATES ATENT V FFICE.

VALVE-MOTION CUT-OFF.

SPECIFICATION forming part of Letters Patent No. 240,756, dated April26, 1881.

Application filed September 27, 1880. (No model.)

California, have invented an Improvement in Valve-Motion Out-Offs; and Ihereby declare the following to be a full, clear, and exact descriptionthereof.

My invention relates to certain improvements in valve-motion and cut-offmechanism for engines; and my present improvements are more especiallyapplicable to a former invention for which Letters Patent were issued tome May 25, 1880, and numbered 227,918.

My present invention relates to the intermediate mechanism which isconnected with the governor, and which regulates the movements of therocker-arm and the trip mechanism of the valves.

It consists of a pair of diagonally-crossed levers, the lower ends ofwhich are pivoted to a horizontally-reciprocating slide operated by acrank or eccentric from the main shaft of the engine, while the upperends are suspended by links from the vertically-moving sleeve on thegovernor-spindle, by the action of which they are raised or depressed,and at the same time drawn together or separated. The upper ends ofthese levers are also united by connecting-rods and crank-arms with therock'shafts, and while actuating them they also regulate the tripmechanism and the closing of the valves.

Figure l is a side elevation of an enginecylinder, valve-chests, andvalve-operating mechanism with my improved attachment. Fig. 2 is an endview of the same. Fig. 3 is a section of the case.

A is the cylinder; B and O, the steam and exhaust valve chests at eachend of the cylinder; D, the rocking cams or arms by which the valves arelifted. E F is the tripping mechanism by which the steam-valves arereleased from the lifter and allowed to close, and G Gr are theconnecting-rods by which this mechanism is actuated, these parts andtheir operation being fully shown and described in my former patent.

In my present invention, H is a slide, which is caused to reciprocatehorizontally within a suitable guide by an eccentric upon the crankshaftby means of the rod I. At opposite ends the tripping-gear.

of this slide two arms, J, are pivoted, and extend diagonally upward, soas to cross each other, as shown. The upper ends of these crossed armsare suspended from the sliding sleeve or collar K on the verticalgovernorspindle L by the arms or rods M. From the upper ends, N, of thearms J, to which the rods M are jointed, the rods 0 connect with therocker-arms P, by which the tripping devices for the valves areoperated.

It will be seen that when the governor runs rapidly the ring K will bedrawn up, and the rods M will draw the ends N of the diagonal arms J upwith them. As these ends are drawn up they approach each other,andthrough the rods 0 they move the rocker-arms P, so as to adjust thetripping mechanism to allow the valves to close sooner. When thegovernor runs more slowly, the ring K, rods M, and arms J descend, andthe upper ends, N, of the arms are separated, thus reversing the actionof the tripping mechanism and allowing the valves to remain open longer.By this constructlon the arms J swing easily about their pivots upon theslide H, and their vertical adjustment is made with little or nofriction, While a lateral movement is imparted to them by the slide, andis communicated by them to It will be seen that the same effect may beproduced without crossing the arms J.

Any suitable form of governor may be employed. In the present case Ihave shown the arms connecting the governor-bal1s with the head, and thesliding collar K as being crossed.

In-order to regulate the action of the governor, I employ a vase orreceptacle, R, which is adapted to contain small shot. The quantity ofshot may be regulated at will, and the motion of the governor thusadjusted to a nicety by the'action of the weight.

I am aware that heretofore in a similar device a receptacle like myreceptacle R has been used to contain mercury to weight the governor,and such weight could be made variable by removing a portion of themercury or adding to it; but the high temperature of engine-rooms andthe highly-volatile character of the mercury render it very unstable forthe purpose of making a variable weight.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- 1. The arms J, having their lower endspivoted to the slide H and approaching or crossin g each otherdiagonally, their upper ends being connected with the ring or sleeve Kof the governor, and with the valve-trippin g mechanism by the rods O,substantially as and for the 10 purpose herein described.

supported by the arms of the governor, in combination with the containedshot or other divided removable solid heavy material by r 5 which theaction is adjusted and regulated, as described.

In Witness whereof I have hereunto set my hand.

EUGENE ON El LL.

Witnesses:

S. H. N OURSE, FRANK A. BROOKS.

